An online guide to wildflowers of the Saylorville Lake Recreation Area, Des Moines River Basin, Polk Co., Iowa, is maintained as a public information project in cooperation with the U.S. Army Corps of Engineers. Each ...

Objectives: To investigate the cognitive effects of high-dose oral estrogen alone or in combination with oral methyltestosterone in postmenopausal women. Methods: Participants were tested with a randomized, double-blind ...

Over the past decade, knowledge of the genetic control of human sex differentiation has greately expanded our understanding of the developmental processes needed to form a male or female. The purpose of this review is to ...

A person's sex can be considered across various levels. To illustrate, genes, hormones, and genitalia can all be considered physical markers of a person's sex. In addition to physical markers, behaviors such as gender role, ...